Solved Subscription form style

Probably the built-in Divi email opt-in module would be a good option - it is designed for subscriptions and supports most of the main subscription providers.

To set up the general layout to be similar to your screenshot, in the Email Optin Settings, set:

Content > Text > Title = "Subscribe"
Content > Text > Button = " " (i.e. a single space so no text is shown)
Content > Text > Body = "Enter email address"
Content > Fields > Show First Name Field = No
Content > Fields > Show Last Name Field = No
Design > Layout > Layout = "Body On Top, Form On Bottom"
Design > Button > Use Custom Styles for Button = Yes
Design > Button > Button Border Width = 0px
Design > Button > Button Icon = {right arrow icon}
Design > Button > Only Show Icon On Hover for Button = No
Advanced > Custom CSS > Module Elements > Subscribe Button = Enter the below css...

Code:

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It doesn't deal with any of the fonts, colors, etc, but should get the elements more or less positioned as per your screenshot.

Hope it helps!

 

You're welcome!